Car vacuum cleaner.
Maybe not many people remember such an invention, like a car vacuum cleaner powered by vacuum from the car muffler pipe.
Advertised as.
Vacuum cleaner, independent of electricity. Powered by pressure from the muffler extractor.
No dust bag is needed, the dust is removed with the flue gas
By sticking the rubber tip into the exhaust pipe, a perfect effect is achieved.
Light and handy Dust-Ex is an accessory, that should be in every well-maintained car.
In this day and age, such a vacuum cleaner would probably not work, but you have to admit that “necessity is the mother of invention”.